Chapters 6: Discrete Probability Distributions
The mean of a random variable is more commonly referred to with this name.
What is the expected value?
This is the area under the normal curve to the right of the mean.
What is 1/2?
According to the Central Limit Theorem, the sampling distribution of the sample mean becomes closer to this type of distribution as the sample size increases, regardless of the shape of the underlying population.
What is a normal distribution?
This is the formula for any confidence interval given a point estimate (PE) and margin of error (ME).
What is PE +- ME?
The mascot for this school is a blue winged horse named "Lightning."
What is Middle Tennessee State University?
In a discrete probability distribution, the sum of the probabilities must equal this amount.
What is 1?
For a normal distribution with a mean of 25 and a standard deviation of 5, this is the value of P(20 < X < 30).
What is 0.68268949?
This is another name given to the standard deviation of a sampling distribution of the sample mean, which is calculated as the quotient of the population standard deviation and the square root of the size of each sample.
What is the standard error of the mean?
When performing a hypothesis test to determine a population proportion (or the difference between two population proportions), we use this type of value as our test statistic.
What is a z-score?
The mascot for this school is a giant blob named "Big Red."
What is Western Kentucky University?
A binomial random variable represents the number of times this phenomenon occurs.
What is success?
The probability that a continuous random variable falls in a given interval is determined by the position of these values, unique to a normal distribution.
What are z-scores?
The population proportion represents this quantity of a sampling distribution of the sample proportion.
What is the mean?
Given a P-value of 0.02, you come to this conclusion for a hypothesis test at the α = 0.05 level of significance.
What does it mean to reject the null hypothesis?
This university has two reptilian mascots: Albert and Alberta Gator.
What is the University of Florida?
What is normal?
This type of scatterplot shows whether a given set of data is normally distributed.
What is a normal probability plot?
Suppose the IQ of humans is approximately normal with mean 100 and standard deviation 15. This is the probability that a simple random sample of size n = 25 results in a sample mean less than 95.
What is 0.04779035?
The advantage to using Welch's formula to calculate degrees of freedom for the difference between two population means is that Welch's formula takes this into account.
What is the difference between standard deviations?
Aubie is the name of the tiger mascot for this school.
What is Auburn University?
This quantity of a binomial probability distribution is found by finding the sample size, probability of success, and probability of failure and calculating the square root of the product.
What is the standard deviation?
In a standard normal distribution, the area under the normal curve to the left of this z-score is 0.25.
What is z = -0.67448975?
To describe any sampling distribution, you must know its shape, its center, and this quality.
What is the spread?
The classical method for testing a hypothesis for a population mean (or the difference between two population means) is based on the position of this type of test statistic.
What is a t-value?
This is the name of the University of Tennessee's mascot, which is a coonhound.
Who is Smokey?